Why is there a sudden interest in this topic? Its rare, and rarely sounds different at all:
1905, Hiretsukan, CTTS, Witch Hunt sound different during there actual screams, but thats frequently just due to you hearing them set beside a male one. I didn't even know flowers in the attic was female til just now. Anomie, IWSMOFY, frequently fall into this category for me.

The only screamo vocalist i'd be more interested hearing as a female than male would be the jerome's dream/deadseraphim style. Because, think of just how much higher they could get? I've also yet to hear one, everyone has heard them doing standard styles or whiny singing (CTTS, i'm looking at you), but no hear peeling vocals?